What do you usually call him? Private enterprises, if they don't have too many demands, just distance themselves psychologically. It is not too much to call uncle. They should emphasize it as the younger generation calls their elders. There should be no ridicule. When talking about business, the tone of normal colleagues is ok. It doesn't fit their so-called adult couple topic. You can keep a straight face, don't be nervous and don't laugh. Nervousness makes you inexperienced and can't help but appear frivolous. If we can keep sinking.
I hope I can help you. Please ask me again if you have any questions.